You may need to buy an additional external GPS receiving antenna. I did for my 750.
Because we love our electronics so tiny, they use an internal antenna. The gold input on the back of it, is for an external antenna available for under $20 from ebay. I used it when I lost reception in NYC, and also in rural areas. The external one has q magnet on it, and you can put it on the roof and have the cord come in your window to the unit (better than arm out window!)

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Hi,
a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Technician (only for users in the US for now) and get all the help you need. Goodluck!

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Related Questions:

Master reset to factory settings and erase all user data: Press and hold the lower right corner of the screen while pressing the power button once. A dialog will come up asking to "Erase all user data".

Please note that all POI's and favorites will be deleted. The Nuvi will start as it came from the box after purchase.

If so the road you on a new road that hasn't been programed into the maps yet?

Could be a few things going on, lost satelite, or a new road.... word to the wise Always carry a road map in your vehicle, GPS is a great tool but not always 100% right especialy if your on a new road, Maps are updated I believe every 6 months or more.

You have a software problem with your NUVI . I recommend you to reset [
restoring default factory settings ] your NUVI

To reset your NUVI , please follow one of these procedures :

1:Turn the Nuvi on.

2:Touch the tools icon on the main screen. The tools icon is represented
by a wrench surrounded by a blue circle.

3:Touch the "Settings" icon which appears as a wrench.

4:Push the "Restore" button at the bottom of the screen. A confirmation
message will appear asking to confirm restoring the Nuvi to factory
settings. Push yes to restore the factory settings
............................................................................................
Try this for hard reset .

Turn off Garmin device. Press down on bottom right corner of the
touchscreen [ Don't let go
] , and then power on the GPS unit. You should be prompted whether do
you really want to erase all user data, or asked if do you really want
to start up in maintenance mode. Press “Yes” to reset (warning: all data
will be erased and lost, so backup before proceeding) or enter
maintenance mode.

1. Turn on the unit2. While it's booting up keep pressing the bottom right corner of the screen.3. A message will appear asking if you want to clear user data. Answer yes.4. Bootup will continue. It's after this that you have to re-enter or confirm your country and time zone.

plug it in to the wall charger or car charger for about 4 hours, then slide and hold power button for up to 15 seconds till it starts.

if that fails, unplug the nuvi then press and hold the lower right hand corner of the screen until you see the message " Do you really want to erase all user data?" remove your finger from the screen and select YES. (this will erase all your saved data) this should reset your nuvi to the factory settings.

use the web updater to update your nuvi once you get it started again.